Loop rug forming attachment for looms



Jan. 4, 1955 J. R. HART LOOP RUG FORMING ATTACHMENT FOR LOOMS J. B/ILPH H198 T INVEN TOR.

BY 614, Jim;

Jan. 4, 1955 J. R. HART 2,698,534

LOOP RUG FORMING ATTACHMENT FOR LOOMS Filed Aug. 29, 1951 4 Sheets-Sheet 2 J'- E/l L PH H/NZT IN VEN TOR.

6111, JTMIW Jan. 4, 1955 J. R. HART 2,698,634

LOOP us FORMING ATTACHMENT FOR LOOMS File d Aug. 29, 1951 4 Sheets-Sheet IS flttorneys Jan. 4, 1955 J. R. HART 2,698,634

LOOP RUG FORMING ATTACHMENT FOR LOOMS Filed Aug. 29, 1951 4 Sheets-Sheet 4 1/. RALPH H027 1mm TOR.

United States Patent 2,698,634 LOOP RUG FORMING ATTACHMENT FOR LOOMS James Ralph Hart, Gadsden, Ala. Application August 29, 19.51, Seu'al No. 244,206 6 Claims. (CL. 139-38) My invention relates to looms, loom attachment for adapting the ture of loop rugs.

It is customary to make loop rugs on, looms WhlCh are built especially for this purpose. Thus, an object of my invention is to provide an attachment for standard looms so that loop rugs can be made .on .said looms.

Another object of the invention is to provide a loom attachment of the character specified that would permit the whole width of the cloth on the loom to be handled and made into a hook rug.

A further object of the invention is to provide an at tachment for making loops on the top of the cloth that the loom is making which attachment is post-ively driven from the .drive mechanism of the loom.

A further object of the invention is to provide gear change mechanism for driving the loop forming apparatus so that loops are formed at selected periodic picks of the lay bar of the loom.

A still further object of my invention is to provide an attachment for making loops in the top of the fabric ing woven by the loom which attachment is periodically attached to the lay of the loom so as to be moved therewith.

More specifically an object of my invention is to provide an attachment for making loops in the upper warp threads of cloth being formed on a loom which mechanism includes a frame attached to the loom, a carriage slidably mounted in the frame, a transverse bar carried by said carriage in parallel relation to the lay of the loom, said transverse bar having hooks thereon for engaging individual warp threads of the upper threads of the warp shed for forming raised loops therein, an arm on the carriage adapted to engage the lay of the loom so that said carriage is moved in unison with the lay, and means for moving said arm into and out of engagement with the lay so that periodic loops will be made in the upper warp threads.

Still further objects and the entire scope of applicability of the present invention will become apparent from the detailed description given hereinafter; it should be understood, however, that the detailed description and specific example is given by 'way of illustration only and, while indicating the preferred embodiment of the invention, is not given by way of limitation, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

For a more complete description of the invention reference may be had to the following drawings and specification and claims.

In the drawing the various figures are referred to as follows:

Figure 1 is a front elevation of a loom having attached e loop forming apparatus according to my invention;

Figure 2 is a side elevation of a. loom having attached the apparatus according to the invention;

Figure 3 is an enlarged detailed side elevation of the gear drive apparatus shown at the left-hand end of Figure 1;

Figure 4 is a side elevation of the apparatus according ot my invention showing the completion of a loop;

Figure 5 is a side elevation similar to Figure 4 showing the hook of the loop forming apparatus as it engages the upper warp thread;

and particularly to a lpom for the manufac- 2 Figure 6 is a plan view of the hook or needle in full scale; and

Figure 7 is a side elevation of the hook or needle of Figure 6.

Throughout the description like reference numerals refer to similar parts.

The frame of a standard loom is generally indicated at 10. The loom arch is generally indicated at 11, the lay sword arm at 12 with its reed 13 and lay 14, see Figure 2. The lower warp threads 11 and 12 are lead from a warp beam 15 over a guide roller 16 and thence through the harness generally indicated at 17, see Figure 2, thence through the warp shed 18, through the reed 13 through the weaving portion of the loom and thence over the roller 19.

The upper warp thread a is fed from a warp beam 20 which has an associated feed roller 21 as mounted on the upper rear portion of the loom frame portion 22. The warp thread a is fed thence over a roller 23 forwardly through the harness generally indicated at 17, through the upper portion of the warp shed 18, through the reeds 13 and to the loop forming area generally indicated at 24, see Figure 2, Where the loops generally indicated at 25 are formed.

The loop forming apparatus according to my invention comprises a pair of slide carriage mechanisms generally indicated at 26 and 27 in Figure l which support therebetween a transverse bar 28 which carries hooks 29 spaced thereon.

Referring to Figure 2 the slide car-riage mechanism 27 is shown attached to the lay 14 by means of a hook eye 30 and the arm 31 on the slide carriage mechanism, The slide carriage mechanism arm 31 is made to engage eye 30 on lay 14 periodically by means of the gear drive mechanism generally indicated at 31p in Figure 1 which will be described in detail hereinafter.

It should be noted in Figure 12 that each time the arm 31 on the slide carriage mechanism 27 engages the eye 30 on lay 14, hook 29 engages the upper warp thread a to form a loop therein as the reach rod 311' connected with carriage 27 actuates the feed rollers 20-21 to pay out sufficient warp thread It to form the loops 25.

For a more detailed explanation of the slide carriage mechanism reference may be had to Figures 4 and 5. These figures depict two different conditions of the slide carriage mechanism 26 as shown at the left-hand end of Figure l depicting the whole loom.

A bracket 32 is provided for attachment to the frame 10 at the beam portion 33 as shown in Figure 1. A frame 34 in the form of a cylindrical member is pivotally attached to the bracket 32 as by a bolt 35 which is secured by a suitable nut 36. Bracket 32 is provided with an arcuate slot '37 at its rear portion. A guide bolt 38 extends through this arcuate slot 37 and is provided with a suitable nut 38'. Thus, the cylindrical frame portion 34 is pivotally mounted at 35 and is guided by the bolt 38 extending through the guide slot 37 in frame member 32.

Referring to Figure '1 it will be noted that cylindrical frame member 34 is provided with a longitudinal bore 39 within which is slidably mounted the carriage 40 in the form of a rod having a transverse plate 41 formed on the rear end thereof. It will be noted that the frame 34 is of sufficient length so that a bearing surface in the bore 39 is provided for the slidable rod 40 or carriage as it is designated. On the transverse rear end 41 of carriage 40 is mounted the transverse bar 28 by means of the bolts 42. It will be noted that the hooks 29 are attached to the lower edge of the transverse bar 28 by means of suitable screws 43.

Referring again to Figures 4 and 5 it will be noted that the bracket 32 is provided with a track 44 which is disposed in a substantial horizontal position and may be formed of suitable angle iron having its rear end portion turned up as at 44' and its front end portion 44" terminating in a vertical edge or end. The purpose of this track 44 will hereinafter be described.

The carriage 4! has towards its rear end but short thereof attached a lug portion 45 which extends transversely thereof as best shown in Figure 1 and which is provided with a transverse bearing bore 46 for pivotally mounting the arm generally indicated at 47. This arm 47 has a rear portion 31 which terminates in a downwardly extending hook 48 which has been previously described as adapted to engage the eye 30 attached to the lay 14. Referring to Figure 2 this rear portion 31 of the arm 47 is shown as bent or extending upwardly and then transversely and then, see Figures 4 and 5, it extends rearwardly and terminates in the hook portion 48. The rear portion of arm 47 is indicated at 49 and it is rigidly attached to the transverse journal portion 50 of arm 47 and extends at the left-hand edge thereof as shown in Figure 1. This second or forward portion of arm 47 as indicated at 49 is provided with a notched or tooth portion as indicated at 51 and the forward end thereof has an upwardly and forwardly slanting surface as indicated at 52. This notch portion or shoulder portion 51 serves to engage over the end 44" of horizontally disposed track member 44. This notch portion 51 also provides a bearing surface at 51' for sliding engagement with the surface of the track 44. This sliding engagement occurs when the carriage 40 slides within the frame 34 when the hook 48 engages with the eye 30 on the lay 14 and the lay is under oscillatory movement.

Again referring to the rear end 31 of arm 47 it will be noted that it is provided with a depending lug 53 having a shoulder portion 53' for receiving one end of a biasing spring 54 whose other end is received over an upstanding lug 55' formed on a boss 55 rigidly attached to the rear end just inboard of the transverse plate 41 on carriage 40. This biasing spring 54 is a compression spring and serves to urge the rear end 31 of arm 47 upward or pivots it counterclockwise about its journal 50 within bearing 46. This serves to rotate the front or second portion 49 of arm 47 in a clockwise direction and to hold it in sliding engagement with the track 44. As the carriage 40 moves to the right as shown in Figure the notch 51 assumes the position over the end of the track 44" as shown in Figure 4 and the hook 48 on the rear end 31 of arm 47 disengages from the eye 30 on lay 14.

The drive mechanism for periodically rotating arm 47 to make it engage with the lay 14 so that the carriage 40 may be driven by the oscillatory movement of the lay 14 will now be described.

Referring to Figures 1 and 2 there is mounted below the breast beam 33 a rectangular box-like member 56 at either end of the frame generally indicated at 10. This box-like structure 56 also serves to support the bracket 32 previously described, This bracket 32 is L-shaped as best shown in Figure 1. Mounted on the forward faces of the box-like brackets 56-56 are pillow blocks 57-57 which serve to support a transverse shaft 58 which is disposed parallel to the lay bar 14 and the transverse bar 28 supported at either end of the slidable carriage assembly generally indicated at 26 and 27 in Figure 1. The lefthand end of shaft 58 is supported and extends through a bearing 59 formed in the frame and has attached a bevel gear 60 of the gear drive assembly 31 shown more in detail in Figure 3.

Referring to Figure 3 it will be noted that frame 10 is provided with a plate or end member 61 to which is bolted suitable pillow blocks 62-62 by means of bolts 63. Within these pillow blocks 62-62 is supported a vertically extending shaft 64 having a small beveled gear 65 secured thereto as by an Allen screw 66. A suitable collar 67 is slidably mounted on the shaft 64 just below the upper pillow block 62. The change gears which indirectlv supply the periodic movement to the oscillating arm 47 will now be described. One of these gears is a bevel gear 68 attached to the lower end of shaft 64 by means of the Allen screw 69. This bevel gear 68 meshes with a bevel gear 70 secured to a horizontally extending stub shaft 71 which is tied into the standard loom drive mechanism generally indicated at 72. These gears 68 and 70 may be proportioned so as to supply a certain desired rotation to shaft 64 and hence in turn transverse shaft 58.

Referring to Figure 1 transverse shaft 58 is shown having mounted thereon discs 73-73 which are fixedly secured as by means of set screws 74. 73 is positioned adjacent the forward portions 49 of arms 47. Each disc is provided with a roller lug 75 near the outer ed e thereof which is secured thereto by means of a bolt 7 6. the purpose of which will hereinafter be described.

Depending from frame 32 is a lug portion 32' Each of these discs which serves to mount a pivot pin 77 which supports an arm 78 which pivots about pin 77 and drops down against a stop in the form of a pin 79 attached to depending lug 32, as best shown in Figures 4 and 5. The forward end of pivoted arm 78 has an upwardly extending portion 78 having a hook-like portion 78" on the forward end thereof. This pivoted arm 78 is mounted directly below and in a vertical plane containing the forward portion or second portion 49 of arm 47. As the disc 73 rotates in a clockwise direction as indicated by the arrow thereon, roller lug 75 strikes against the pivoted arm 78 as at its portion 78 and rotates it in a counterclockwise direction so that it rides against the upwardly and forwardly extending inclined surface 52 on the underneath side of arm portion 49. Thus, in the position shown in Figure 4 the rotary lug '75 is just about ready to strike pivoted arm 78 and it in turn will strike against portion 52 of arm 49 to rotate same in a counterclockwise direction to release the notch 51 from the end portion 44" of track 44. As this occurs arm 47 pivots in a counterclockwise direction and the hooked end 48 will engage with the eye 30 attached to the lay 14 of the standard loom. As lay 14 oscillates to the left it carries carriage 40 therewith and brings the hook 29 into sliding engagement with the upper warp thread it. In the movement of the carriage to the right the loop is formed as at 25 as best shown in Figure 4. During the forming of the loop the normal operation of the loom continues with its shuttle operation.

In Figure 6 there is shown a full sized plan view of the hook 29 which is provided with a flat base portion 80 apertured at 80 for receiving the securing screw as shown in Figure 4 which attaches the hook to the transverse bar 28. At right angles to the end of the base portion 80 is a web portion 81 having an upper surface which is curved as indicated at 81 from its juncture at a with the portion 80 to the tip end at b. Extending at substantial right angles or transverse to the web 81 is the hook 82 as best shown in Figure 6. This extends at an angle of substantially 45 with the web portion 81. In Figure 7 it will be noted that the hook portion 82 is inclined slightly upward from the bottom plane containing the hook end 81 and the base portion 80. A plurality of these hooks are attached along the underneath side of bar 28 as shown in outline in Figure 1 but more in detail in Figures 4 and 5. The web portion 81 rides up against the upper warp thread a in the forward motion of the carriage 4i) and the thread u rides over the hook portion 82 and is caught between the inner surface of the hook 82 and the face of the web portion 81 of the hook. Then as the carriage 40 moves to the right as shown in Figures 4 and 5 the loop 25 is formed in the upper warp thread.

Referring to Figure 2 the reach rod 31r connects at its lower end as at 31r in Figure l with an extension 50 on arm 47. Thus as carriage 40 is reciprocated back and forth so also is the reach rod 31r moved back and forth. At the upper end of rod 312' there is attached by means of a bolt an arm 91 which is pivotally mounted as at 92 on the common axis of the warp beam 20. Arm 91 is provided with a slotted upper end as at 93 to which is slidably attached a bracket 94 by means of a bolt 95. Bracket 94 has pivotally attached a dog 96 by means of a bolt 97 and this dog 96 depends and engages with ratchet teeth 98 on a ratchet wheel 99 which rotates with the warp beam 20. A suitable gear 100 turns with ratchet wheel 99 to drive the cooperating feed roll 21 mounted above roll 20. Thus as each loop is formed the reach rod 31r riding with the carriage 40 rotates the breast beam 20 in a counterclockwise direction to feed off an increment of warp thread It sufficient to form the loop.

As explained above these loops may be spaced every two, four, six or eight picks of the lay as desired by selecting suitable gears 68 and 70 as shown in Figure 3. This drive mechanism as shown in Figure 3 serves to rotate discs 73-73 on shaft 58 so as to cause carriage 40 to be engaged with the lay 14 and moved therewith.

This mechanism as I have devised is easily attached to a standard loom such as the Draper Loom and it provides for permitting the whole width of the cloth to be accommodated and to have loops made therein across the width of the cloth dependingon the spacing of the needles 29 and the supply of theupper warp threads u as previously described. This mechanism provides for a positive drive in that the cross bar 28 carrying the hooks 29 receives its movement directly from the lay 14.

While I have described the preferred embodiment of my loop forming attachment for looms various changes may be made therein without departing from the scope of my invention.

I claim as my invention:

1. A loop forming attachment for looms having a lay and power drive mechanism, said attachment comprising a bracket member adapted for attachment to said loom and having a track portion, a frame adapted for pivotal attachment to said bracket member, a carriage slidably mounted in said frame, a transverse bar connected to said carriage in parallel relation to said lay, hooks secured to said bar for engaging individual warp threads of the upper threads of the warp shed and for forming raised loops therein, an arm pivotally mounted on said carriage having a first portion adapted for engagement with said lay and a second portion provided with a catch adapted for holding engagement with one end of said track portion in one position and sliding engagement over said track portion in another position, biasing means disposed between said carriage and said first portion of the arm whereby said first portion of the arm is urged out of engagement with said lay when said catch on the second portion of the arm engages with the end of said track, means driven by said power drive mechanism for periodically engaging and moving said second portion of the arm so that said catch thereon is moved out of engagement with the end of said track thereby permitting said catch to slide along said track, said first portion of the arm engaging said lay and said carriage being moved with its transverse bar and hooks in unison with said lay until said catch on said second portion of the arm reaches the end of the track.

2. A loop forming attachment for looms of the character described in claim 1 wherein said means driven by said power mechanism for periodically disengaging said latch comprises a second arm adapted to be moved into contact with said second portion of said first arm, a transverse shaft mounted in said loom parallel to said lay, gear means connecting said shaft to said power drive mechanism of the loom, a disc fixed to rotate with said shaft and positioned adjacent to said second arm and trip means on the outer portion of said disc for engaging said second arm to periodically come into engagement with said second portion of the first arm and trip said catch.

3. A loon forming attachment for looms of the character described in claim 2 wherein said second arm is pivoted at one end on said bracket member attached to said loom and interposed between said first catch portion on the second portion of said arm and said trip means on the outer portion of said disc whereby said trip portion on said disc strikes said second pivot arm and said second pivot arm strikes said second portion on said first arm pivoted on said carriage to release said catch on the second portion of the arm from the end of said track.

4. A loop forming attachment for looms of the character described in claim 2 wherein said transverse bar is carried at each end thereof by a carriage slidably mounted in a frame attached toward each side of the loom and each carriage is provided with said arm and said biasing means and each frame has an associated track.

5. A loop forming attachment for looms of the character described in claim 4 wherein said shaft is provided with a disc fixed thereto towards each end adjacent each of said carriages and each disc is provided with means on the outer portion thereof for engaging a second arm operatively and adjacently positioned by said second portion of said first arm to periodically trip in unison said catches on the second portion of said first arm.

6. A loop forming attachment for looms having a lay, feed rolls for a first set of warp threads and power drive mechanism, said attachment comprising a bracket member adapted for attachment to said loom and having a track portion, a frame adapted for pivotal attachment to said bracket member, a carriage slidably mounted in said frame, a transverse bar connected to said carriage in parallel relation to said lay, hooks secured to said bar for engaging individual warp threads of said first set and for forming raised loops therein, an arm pivotally mounted on said carriage having a first portion adapted for engagement with said lay and a second portion provided with a catch adapted for holding engagement with one end of said track portion in one position and sliding engagement over said track portion in another position, biasing means displosed between said carriage and said first portion of the arm whereby said first portion of the arm is urged out of engagement with said lay when said catch on the second portion of the arm engages with the end of said track, means driven by said power drive mechanism for periodically engaging and moving said second portion of the arm so that said catch thereon is moved out of engagement with the end of said track thereby permitting said catch to slide along said track as said carriage carrying said arm slides in its frame, said first portion of the arm engaging said lay and said carriage being moved with its transverse bar and hooks in unison with said lay until said catch on said second portion of the arm reaches the end of the track, and means connected to said carriage and to said feed rolls for the first set of warp threads to rotate said feed rolls to feed warp threads each time said hooks engage said warp threads to form loops therein.

References Cited in the file of this patent UNITED STATES PATENTS 222,477 Ellison Dec. 9, 1879 610,563 Sargent et a1. Sept. 13, 1898 2,574,108 Kahn Nov. 6, 1951 FOREIGN PATENTS 1,931 Great Britain of 1861 5,621 Great Britain of 1891 

